256 
In this connection I will add that I have been surprised to 
see of late in “ Nature” letters concerning double Messina and 
Valentia oranges. I had supposed this to be a familiar obser- 
vation. W. WHITMAN BAILEY. 
BROWN UNIVERSITY, June 13, 1892. 
The American Association for the Advancement of Science will 
hold its annual meeting at Rochester, New York, beginning Aug- 
ust 17th, and continuing fora week. It will be an importags 
meeting for the botanists, because the question of dividing Sec- 
tion F—Biology—into two, one of Botany and one of Zoology; 
will come up for action. It is very desirable that all botanists 
who can attend will do so, and that they will present much good 
matter before the Section and the Botanical Club of the Associa- 
tion, which will hold frequent sessions during the meeting. 
Index to Recent Literature Relating to American Botany. 
Agave Engelmanni, n. sp. Wm. Trelease. (3d Ann. Rep. 
Missouri Bot. Gard. 167-168, Plate 55). : 
Albinos Among Orchids. J. ¥. Collins. (Gard. & For. v. 299): 
The white form of Habenaria psychodes is reported from 
North Anson Village, Maine. : 
‘American Ashes—The. Geo. B. Sudworth. (Hardwood, |. 
No. 10). e 
Aphelandra tetragona, var. imperialis, HH. Gzrdt and L. Witt- 
mack. (Gartenflora, t. 1354). 
Arundinella—Sur les Characteres des. HH. Baillon. (Bull. Mens. 
Soc. Linn. Paris, i. 1023, 1024). 
Asclepias glaucescens and A. elata—Notes on. J. N. Rose 
(Bot. Gaz. xvii. 193). 
Asplenium montanum. (Meehan’s Monthly, ii. 97, with colored 
plate). 
Begonia Baumanni. 1. Wittmack. (Gartenflora, t. 1348). 
A new species from Bolivia. 
Boltonia latisquama. (Gard. & For. v. 268 illustrated). 
Cathestechum—Sur Yorganisation du Genre. HH. Baillon. Bull. 
Mens. Soc. Linn. Paris, i. 1028-1030). ; 
Champignons parasites de la Vigne—Sur quelques. P. Viala et 
